Condenser for refrigerating machines



Jun 6, 1933. R w, AYRES 1,913,186

CONDENSER FOR REFRIGERATING MACHINES Filed March 1, 1952 2 Sheets-Sheet1 Fig.2.

Inventor": Russell \VAgres.

His Attovney June 6, 1933. R. w. AYRES 3,

CONDENSER FOR REFRIGERATING MACHINES Filed March 1, 1952 2 Sheets-Sheet2 Inventor Russell \VA gres',

His Attorney.

Patented June 6, 1933 UNITED STATES RUSSELL W. Am

J 001mm, A CORPORATION 01' NEW YORK commas. r03. mmeaname mommaApplication filed Iar'oh 1, 1m. lei-tel Io. raaoes.

1 My invention relates to air cooled condensare, for refrigeratingmachines, of the type having a passageway through which the refri rantflows, the refrigerant being cooled an condensed by the circulation ofair, which is induced either by forced or natural draft.

The objectof my invention is to rovide an im roved condenser of thistype aving a flui assageway formed betweensheets of meta, and to providea fabricated construction which is simple and inexpensive tomanufacture.

Further objects and advantages of m? invention will become apparent asthe fo lowing descri tion roeeeds, and the features of novelt w ich caracterize my invention will be pointed out with articularity in theclaims annexed to and orming a part of this specification.

In the drawings, Fig. 1 is a front view, partly in section, of myimproved condenser arranged about a casing of a refrigerating machine;Fig. 2 is a plan view of the construction shown in Fig. 1; Fi 3 and 4:aresideelevations of corrugated s eets of metal of the forms which Iemploy in formin the condenser shown in Figs. 1 and 2; an Fig. 5 is afragmenta perspective view of the sheets shown in igs. 3 and 1 afterthey have been united at their top andbottomv ed s and bent intocylindrical form.

- In igs. 1 and 2 of the drawings, I have shown my invention inconnection with a compression refrigerating machine of the neralconstruction described and claimed in United States Letters Patent No.1,7 36,635,

granted November 19,1929, on the application of Christian Steenstrup, tothe assignee of the present invention. In the construction shownin theaccompanying drawings, this machine comprises a motor and compressorunit arran d in a refri erant containing casing 1 w ich is mounte on abase 2 adapted to be removably supported in an opening in -arefrigerator cabinet. A plurality of fins 3 are attached t0 the casing 1for effectively dissipating the heat from themotor and compressor withinthe casing 1. During operation of the machine the refrigerant gas isdischarged from the compressor into the casing 1, and flows through aconnection 4 into an air cooled condenser .5 embodying my invention. Therefrigerant is is condensed in the condenser 5 and flows therefrom,through a connection 6 and a flow controlli device 7, which maintainsthe desired 'difl'erence in pressure between the condenser and the everater during operation of the machine, mto an evaporator 8 secured tothe base 2, and arranged within the refrigerator cabinet. The va rizedrefrigerant is withdrawn through pipe 9 from the evaporator 8 by thecompressor, in which it is compressed a in and the refrigerat' cyclerepeated. e motorinthe casing is controlled in response to the temrature of the evaporator 8 by .a thermostatic device 11. A valvedconnection 10 communicates directly with the condenser 5 throu h theconnection 6, between the flow contro 'ng device- 7 and the condenser,for charging the machine, or urgin the machine'of any noncondensib e gast at may accumulate in the. condenser.

- In accordance with my invention the condenser 5 is fabricated of sheetmetal, and made annular in form to minimize the number of welds orjoints required to withstand the pressure to which the condenser issubjected.

I make the condenser 5 by formixli g the sheets of metal 12 and 13, asshown in 1 3 and 4, with longitudinal ooves 17 an 18 which terminate atthe en s of the sheets, and at the same time forming grooves in thesheets, which connect the ion 'tudinal grooves in pairs at opposite endsto orm continuous zig-zag grooves extending from the top to the bottomof the sheets. Inlet and outlet openings 23 and 24 are unched in thesheet 13 at the opposite ends 0 the zig-zag groove therein. After thesheets 12 and 13 are formed in this manner, I place them together, sothat the zig-zag grooves in the sheets are aligned with each other toform the continuous passageway 16, unite the edges at 14by welding, andfold over the edges of the sheet 12, as indicated at 14 in Figs. 1 and01' summery, NEW YOK: LBSIGNOB T0 GENERAL name prefer not to weld theseend edges of the sheets together until after the sheets are bent 1 intocylindrical form, so that the inner sheet refrigerant to the zig-zagwill be free to creep on the outer sheet in bendin and thereby avoidbuckling-of the inner s eet, which might weakenfthe construction. Ioverlap and weld the opposite ends of the sheets together to forman'annular body, as indicated at 15 inF i 2. I weld the arms of theU-shaped p ates 19 about the upper portion of the sheet 13 at 20, andsupport the entire structure about the casing 1 in spaced relation tothe base 2 of the refrigerating machine by riveting the inner ends ofthe plates 19 to the outer ends of the uplper portion of the fins at 21,as shown in ings 19' being arrange on the rivets between the plates 19and fins. I then secure the connection 4 between the inlet opening 23and the casing 1, and theupper end of the pipe 6 in the outlet opening24 to connect the passageway 16 with the flow controlling device 7 andthe evaporator 8.

In this construction it is not necessary to weld the sheets 12 and 13together between the corrugations in the sheets, because bending thesheets into cylindrical form stretches the outer sheet 12 about thesheet 13 in close contact therewith and confines the flow of passa e 16formed by the grooves in the sheets. loreover, the grooves in the sheets12 and 13 reinforce the construction, and prevent the sepa ation of thesheets by thepressure of the re rigerant It will thus be seen that Ihave provided an improved condenser, in which the sheets of metal ofcylindrical form are utilized as an air flue, and have a large externalsurface presented to the surrounding air for effective- 5y cooling andcondensing the refrigerant owireig through the zig-zag passageway formtherein. Moreover, a simple fabricated construction is obtained in whichthe inner cylindrical sheet is retained in close contact with the outersheet, so that welding of the sheets between the grooves forming therefrigerant passageway is unnecessary. This produces an inexpensive andeasily manufactured construction.

Although I have illustrated and described a particular embodiment of myinvention, I do not desire to be limited to the particular arrangementset forth, and I intend in the following claims to cover allmodifications which do not depart from the spirit and scope of myinvention.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

1. An air-cooled condenser for refrigerating machines. including abodyhaving contacting metallic sheets joined together at the igs. 1 and 2(iheat insulating bushends thereof to form an annulus, one ofrsaid sheetshaving a continuous zig-zag groove cooperating with the other of saidsheetsto form a passageway extendin from one slde of said joint aboutsaid b y and between said sheets to the other side of said joint.

' 2. An air cooled condenser including a casing, an annular bodyarranged about said casin hand.

y RUSSELL AYRES.

